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Community Water System · PWS CO0107321

Grace Mar Wua

Wheat Ridge, Colorado 80033 - drinking water served from groundwater sources to 50 people, tracked in EPA SDWIS and UCMR5.

50
People served
123
EPA violations
7
Health-based
Untested
UCMR5 result

The verdict

EPA records 123 drinking-water violations at Grace Mar Wua, 6% of them health-based - above the Colorado per-system average.

123
Total EPA violations on record
6%
Health-based (MCL / treatment failure)
50
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Grace Mar Wua

Grace Mar Wua is a private-owned community water system that delivers drinking water to 50 residents in Wheat Ridge, Colorado (Boulder County) through 15 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 123 total violations for this system , of which 7 (6%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 110 monitoring and reporting violations are on file. The most recent violation on record dates to 2019.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 12 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Colorado, EPA tracks 2,193 public water systems serving 7,473,456 people, with 238,796 cumulative violations and 30,589 health-based violations on record. About 93% of systems in the state carry at least one violation, and state-wide the average per system is 108.9 violations. Statewide, 37 of 163 UCMR5-tested systems have reported PFAS detections (22.7%).

Grace Mar Wua's 123 violations sit above the Colorado average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
50
Total Violations
123
Health-Based Violations
7
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
15
County
Boulder
School/Daycare
No
MCL Violations
7
Monitoring Violations
110
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 12 2008
Coliform (TCR) MCL 4 2009
Toxaphene MR 3 2005
Dalapon MR 3 2005
OXAMYL MR 3 2005
Aldicarb sulfone MR 3 2005
Carbofuran MR 3 2005
LASSO MR 3 2005
Heptachlor MR 3 2005
2,4,5-TP MR 3 2005
HEXACHLOROBENZENE MR 3 2005
Benzo(a)pyrene MR 3 2005
1,2-DIBROMO-3-CHLOROPROPANE MR 3 2005
Chlordane MR 3 2005
Simazine MR 3 2005
Nitrate MR 3 2019
Heptachlor epoxide MR 3 2005
Total Polychlorinated Biphenyls (PCB) MR 3 2005
Atrazine MR 3 2005
ETHYLENE DIBROMIDE MR 3 2005
Di(2-ethylhexyl) adipate MR 3 2005
Endrin MR 3 2005
Endothall MR 3 2005
BHC-GAMMA MR 3 2005
Hexachlorocyclopentadiene MR 3 2005
Picloram MR 3 2005
Dinoseb MR 3 2005
Aldicarb sulfoxide MR 3 2005
Pentachlorophenol MR 3 2005
Diquat MR 3 2005

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Grace Mar Wua.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID CO0107321 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Colorado Drinking Water Authority

Colorado Department of Public Health and Environment, Water Quality Control is the primacy agency that licenses and inspects Grace Mar Wua under EPA-delegated authority.

Open CO regulator portal

Source: Colorado Department of Public Health and Environment, Water Quality Control

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2019 Nitrate MR 3 SDWIS / CO0107321 / 1040
2009 Coliform (TCR) MCL 4 SDWIS / CO0107321 / 3100
2008 Coliform (TCR) MR 12 SDWIS / CO0107321 / 3100
2006 Consumer Confidence Rule Other 2 SDWIS / CO0107321 / 7000
2006 Selenium MR 2 SDWIS / CO0107321 / 1045
2005 Toxaphene MR 3 SDWIS / CO0107321 / 2020
2005 Dalapon MR 3 SDWIS / CO0107321 / 2031
2005 OXAMYL MR 3 SDWIS / CO0107321 / 2036
2005 Aldicarb sulfone MR 3 SDWIS / CO0107321 / 2044
2005 Carbofuran MR 3 SDWIS / CO0107321 / 2046
2005 LASSO MR 3 SDWIS / CO0107321 / 2051
2005 Heptachlor MR 3 SDWIS / CO0107321 / 2065
2005 2,4,5-TP MR 3 SDWIS / CO0107321 / 2110
2005 HEXACHLOROBENZENE MR 3 SDWIS / CO0107321 / 2274
2005 Benzo(a)pyrene MR 3 SDWIS / CO0107321 / 2306

How Grace Mar Wua Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Grace Mar Wua Colorado avg Federal benchmark
Total violations 123 108.9 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 7 13.9 Indicates a contaminant exceeded a federal MCL
PFAS detection None 22.7% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 50 3,408 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,193 regulated public water systems in Colorado.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Grace Mar Wua water safe to drink? ▼
Grace Mar Wua (PWS ID: CO0107321) has 123 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 50 people using Groundwater sources.
How many people does Grace Mar Wua serve? ▼
Grace Mar Wua serves 50 people in Wheat Ridge, Colorado. It is a Private-owned system using Groundwater water sources with 15 service connections.
What type of violations does Grace Mar Wua have? ▼
Grace Mar Wua has 123 total violations: 7 health-based violations (MCL exceedances or treatment failures), 110 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Grace Mar Wua water? ▼
No PFAS testing data is available for Grace Mar Wua under the EPA's UCMR5 monitoring program.
What water source does Grace Mar Wua use? ▼
Grace Mar Wua uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.